Cisco AIR-LAP1142N-N-K9

  1. Start a TFTP server and the console session.

    Download the boot image c1140-k9w7-tar.default to the "Base Directory" set in a running Tftp64 server (Ensure the PC firewall allows incoming and outgoing connections to the TFTP server on port 69).
    Plug in a serial cable to "CONSOLE" port of the access point from PC COM1 port
    Open PuTTY and select "Serial" connection type, leave baud rate (Speed) and other settings as default.
    Plug in an ethernet cable into an ethernet port of a PC from either (a) the ethernet port of the access point, or (b) the "To Switch" port of a running power injector device.
    Manually set the ethernet PC interface IP to the same subnet as the default IP of the Access Point which is 10.0.0.1 and ensure the same IP is selected in the TFTP "Server interfaces" dropdown:
    PC ethernet interface IP settings Tftp settings

  2. Power on the access point.

    Press and hold down the "Mode" button:
    Cisco AIR-LAP1142N-N-K9
    Plug in either (a) a running 56 volt power supply into the power port, or (b) a Power over Ethernet cable to the PoE port of the Access Point from the "To AP" port of the power injector:
    IOS Bootloader - Starting system. FLASH CHIP: Numonyx P33 Checking for Over Erased blocks ...................................................................................................................................................................................................................................................... Xmodem file system is available. DDR values used from system serial eeprom. WRDTR,CLKTR: 0x86000800, 0x40000000 RQDC, RFDC : 0x80000036, 0x0000020d PCIE0: link is up. PCIE0: VC0 is active PCIE1: link is up. PCIE1: VC0 is active PCIEx: initialization done flashfs[0]: 25 files, 8 directories flashfs[0]: 0 orphaned files, 0 orphaned directories flashfs[0]: Total bytes: 32385024 flashfs[0]: Bytes used: 6922240 flashfs[0]: Bytes available: 25462784 flashfs[0]: flashfs fsck took 26 seconds. Reading cookie from system serial eeprom...Done Base Ethernet MAC address: 64:00:f1:3d:37:b8 Ethernet speed is 1000 Mb - FULL duplex button is pressed, wait for button to be released...
    Release the Mode button after 20-30 seconds.
    button pressed for 26 seconds process_config_recovery: set IP address and config to default 10.0.0.1 process_config_recovery: image recovery image_recovery: Download default IOS tar image tftp://255.255.255.255/c1140-k9w7-tar.default
    It should start extracting files from the autonomous image:
    examining image... extracting info (283 bytes) Image info: Version Suffix: k9w7-.153-3.JD17 Image Name: c1140-k9w7-mx.153-3.JD17 Version Directory: c1140-k9w7-mx.153-3.JD17 Ios Image Size: 8376832 Total Image Size: 9574912 Image Feature: WIRELESS LAN Image Family: C1140 Wireless Switch Management Version: 8.3.150.0 Extracting files...

  3. Check the autonomous image is running with no configuration

    When the files finish extracting the access point should automatically reboot:
    Deleting current version: flash:/c1140-k9w8-mx.124-21a.JHA...done. New software image installed in flash:/c1140-k9w7-mx.153-3.JD17 Configuring system to use new image...done. Requested system reload in progress...download took about 385 seconds
    Further output should bring you to the Press RETURN to get started! prompt. Press the Enter key to get to the ap> prompt:
    Press RETURN to get started! ap>
    Type enable for elevated privileges, and Cisco when prompted for a password. Check there is no left over data using the commands dir and show startup-config and show vlans:
    ap>enable Password: Cisco ap#dir Directory of flash:/ 2 -rwx 6168 Mar 1 2002 00:14:55 +00:00 private-multiple-fs 35 drwx 768 Jan 1 1970 00:06:52 +00:00 c1140-k9w7-mx.153-3.JD17 7 drwx 128 Mar 1 2002 00:13:53 +00:00 c1140-rcvk9w8-mx 5 -rwx 271 Jan 1 1970 00:07:00 +00:00 env_vars 32126976 bytes total (20342917 bytes free) ap#show startup-config startup-config is not present ap#show vlans No Virtual LANs configured.

  4. Copy all the output from the session into your records.

    Right-click PuTTY's titlebar, from that dropdown menu click on "Copy All to Clipboard"
    Open the file of record certifying the deconfiguration of this device and use CTRL V to paste all the output from PuTTY into that file. Formatting the text with a fixed-width font helps it look more readable.

  5. End the session.

    Turn off/unplug the device and close PuTTy and the TFTP server.